Collin County, TX Water Table Trend
Collin County, TX: the closest actual trend
Johnston County, OK, 77 miles from Collin County, is the closest county with a qualifying well, and its water table is declining at a typical pace for a declining county.
No well inside Collin County clears this site's 15-year qualifying bar, so this is the closest real reading, not a measurement of Collin County's own aquifer. Worth checking your own well's depth log against it rather than assuming it matches. See Johnston County, OK's full page. See the no-data guide for why a county this close to a qualifying well still doesn't get its own number.
About Collin County
Collin County, Texas covers 842 square miles and is home to about 1,254,658 people. USGS's National Groundwater Monitoring Network covers 1,449 of 3,222 US counties (45%) today; Collin County isn't one of them yet, see the methodology guide for the exact qualifying bar.